Quote:
Originally Posted by Phil Yearout
They’re drill marks from cutting the stone.
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Granite fence posts are fairly common in New England. New Hampshire and Vermont have many quarries still in operation.
Splitting a stone is pretty fascinating to watch. A row of holes are drilled, spacing dependent on the depth of the stone. Two steel 'fingers' are set in the hole, and one tapered pin, in between. The man would go down the line of holes, giving each taper pin one tap, then back again. The accumulated pressure along the line eventually split the stone.
I always said you could split ash darn near finished lumber, but granite fence posts are a close second.